Clare Island Survey — Archiannclida and Polijchaela. 47 143 



G. Bunevi and G.infuiidibuliformis. At the base of the spatulafce setae is a 

 row of short, slender setae, the basal setae, 13 in number (fig, 32g). They 

 are bayonet-shaped, with finely pointed tips, and some of them have very 

 narrow wings. All these setae have shafts with delicate longitudinal 

 striations, and are very finely dotted. 



In the ventral division there are 17-27 long, stout crochets (fig. 32j). 

 The main tooth is long and stout, making rather more than a right angle 

 with the neck. Behind it are two distinct teeth and several indistinct ones. 

 At the back of the crown is a delicate wing. I have noticed a similar wing 

 in other species of Sabellidae. The shaft expands slightly below the neck, 

 and is longitudinally striated. 



In the abdominal segments the capillary setae are long and slender 

 (fig. 32k), with very narrow wings. There are 10 in the first segment, 

 12 in the sixth. Below the origin of the wing, the shaft has a characteristic 

 bend, and narrows suddenly, giving the setae the aspect of a very slender- 

 bayonet. The capillary setae in the abdominal segments are longer than 

 those in the thoracic segments. 



There are 34 uncini in the first abdominal segment, 42 in the sixth. 



The upper uncini are very small compared with the lower ones, but in all 



segments of the abdomen they have a similar shape. In surface view 



(fig. 32l, b) the crown shows seven or eight rows of teeth, 5-7 in a row. In 



side view (fig. 32l, a) the main tooth projects beyond the base, and is 



surmounted by 10-12 rows of teeth. These numerous teeth are very 



characteristic of the uncini of this species. The posterior margin is rounded. 



The 13th abdominal segment has 5 capillary setae and 35 uncini. 



Mature specimens were found in May, July, and August. 



This species is readily distinguished from forms already described, with 



the exception of C. suspecta, Krdyer, by the presence of the filiform anal 



appendage. The latter species, recently redescribed by Hofsommer (1913, 



p. 339), has a conical anal appendage. In other respects, however, it 



shows considerable differences. It has 35-42 segments, as compared with 



26-28, 6 pairs of branched gills, as compared with 8 or 9, and finally the 



setae are very different. The difference is specially marked in the number 



of setae in each bundle, it being far greater in G. filicaiidata than in 



G. suspecta. The shape of the basal thoracic setae (' spieszborsten ') is quite 



different in the two species, and finally the abdominal uncini of G. filicaitdata 



are quite characteristic. 



Habitat. — Clew Bay — Three specimens dredged in Inishlyre Harbour, in 

 5 fms. Ballvxakill HaP.boue — A single specimen dredged 

 in 2 fms. 



